Active hybrid circuit for a full duplex channel

a hybrid circuit and full duplex channel technology, applied in the direction of amplitude demodulation, line-faulst/interference reduction, instruments, etc., to achieve the effect of reducing the energy of the transmitted signal

Active Publication Date: 2006-09-12
RDC SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The main object of the present invention is to provide an active hybrid circuit for a full duplex channel. This invention generates a duplicated voltage at a current output stage to reduce the energy of the transmitted signal at the receiver when it is

Problems solved by technology

Because transformers are not perfect, trans

Method used

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  • Active hybrid circuit for a full duplex channel
  • Active hybrid circuit for a full duplex channel
  • Active hybrid circuit for a full duplex channel

Examples

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Embodiment Construction

[0024]Referring to FIG. 3, there is shown a schematic diagram of one embodiment of an active hybrid circuit for a full duplex channel of the present invention. The active hybrid circuit comprises a transmit digital-to-analog converter (DAC) 50 having a positive output port 501 and a negative output port 502 for generating an analog transmit signal and a receive analog-to-digital converter (ADC) 52 having a positive input port 521 and a negative input port 522 for receiving an analog receive signal. The positive input port 521 and the negative input port 522 of the receive analog-to-digital converter 52 is electrically connected to the corresponding positive output port 501 and negative output port 502 of the transmit digital-to-analog converter 50. A duplicated voltage digital-to-analog converter 54 having a positive output port 541 and a negative output port 542 is electrically connected to the positive output port 501 and negative output port 502 of the transmit digital-to-analog ...

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Abstract

An active hybrid circuit for a full duplex channel generates a duplicated voltage at the current output stage to reduce the energy of the transmitter transmitted to the receiver. The active hybrid circuit cancels the energy of the transmitter transmitted to the receiver when it is operated in a full duplex channel with high-speed transmission. The active hybrid circuit for full a duplex channel comprises a transmit digital-to-analog converter for generating an analog transmit signal, a receive analog-to-digital converter for receiving an analog receive signal, a duplicated voltage digital-to-analog converter for generating a corresponding duplicated voltage according to the analog transmit signal of the transmit digital-to-analog converter, and a plurality of signal combiners for subtracting the duplicated voltage from the analog transmit signal to cancel the influence of analog transmit signal to the analog receive signal.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an active hybrid circuit for use in a full duplex channel. In particular, this invention provides an active hybrid circuit to generate a duplicated voltage of a current output stage for reducing the energy of the transmitter echoing to the receiver when the hybrid circuit is operated in a full duplex channel.[0003]2. Description of the Related Art[0004]Due to the demand for information communication, such as the transmission of data, sound, and video, the data transmission rate has improved continually as the hardware and communication protocol have progressed to achieve high-speed and real time transmission. Information transmission and business transactions over the Internet have increased as personal computers, workstations and servers become more and more popular. For Ethernet, the transmission rate has also improved from the early original 10 Mbps of the IEEE 802.3 10BASE-T standard...

Claims

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Application Information

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IPC IPC(8): H03M1/66
CPCH04B3/03H04B1/58
Inventor YEN, MING-CHOULIN, HSIN-CHIEHTSAI, KUN-YINGKO, JUI-TAIWEI, CHUN-WANG
Owner RDC SEMICON CO LTD
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